// support.js
class Container {
    static of(value){
        return new Container(value)
    }
    constructor (value) {
        this._value = value
    }
    map(fn){
        return Container.of(fn(this._value))
    }
}
class Maybe {
    static of(x){
        return new Container(x)
    }
    constructor (x) {
        this._value = x
    }
    isNothing() {
        return this._value === null || this._value === undefined
    }
    map(fn){
        console.log(fn(this._value))
        return this.isNothing() ? Maybe.of(null) : Maybe.of(fn(this._value))
    }
}
module.exports = {
  Maybe,
  Container
}